*{
	margin: 0;
	padding: 0;
}
#head{
	width: 100%;
	height: 80px;
	background: white;
	text-align: center;
}
.context{
	margin-top: 30px;
}
#sel{
	width: 100px;
}
#btn{
	width: 50px;
}
#ifa{
	border: none;
}